Interface ElementTraversal

public interface ElementTraversal
The ElementTraversal interface is a set of read-only attributes which allow an author to easily navigate between elements in a document.

In conforming implementations of Element Traversal, all objects that implement Element must also implement the ElementTraversal interface. Four of the methods, getFirstElementChild(), getLastElementChild(), getPreviousElementSibling(), and getNextElementSibling(), each return a live reference to another element with the defined relationship to the current element, if the related element exists. The fifth method, getChildElementCount(), exposes the number of child elements of an element, for preprocessing before navigation.

See also the Element Traversal Specification.

  • Method Details

    • getFirstElementChild

      Element getFirstElementChild()
      Returns the first child element node of this element. null if this element has no child elements.

    • getLastElementChild

      Element getLastElementChild()
      Returns the last child element node of this element. null if this element has no child elements.

    • getPreviousElementSibling

      Element getPreviousElementSibling()
      Returns the previous sibling element node of this element. null if this element has no element sibling nodes that come before this one in the document tree.

    • getNextElementSibling

      Element getNextElementSibling()
      Returns the next sibling element node of this element. null if this element has no element sibling nodes that come after this one in the document tree.

    • getChildElementCount

      int getChildElementCount()
      Returns the current number of element nodes that are children of this element. 0 if this element has no child nodes that are of nodeType 1.